usoclient is something run by a company called I-Sprint innovations. Norton, I believe, class it as a virus but browsing is very vague. I believe it is , possibly, (?) harmless and is more a spamming program than a virus, but that is a personal opinion. It does look, on reading the various items regarding it, that it is a cookie that looks at things concerned with your finances etc, in order to draw up stats - just a guess.
I detected it, first, after installing build 122. In my case, I found it here C:\Windows\WinSxS\amd64_microsoft-windows-update-usoclient_31bf3856ad364e35_10.0.10122.0_none_341150ce4a5150c7 and deleted it. You need to change the security permissions first. This was a while ago, and I have not seen ant bad side effects.